Vise for saws.



J. MIGNOLA, JR.

VISE POR SAWS.

APPLmumH Hun our. 27, 190s.

552,01 3, Patented Mar. 15, 1910.

IN VEN TOR /M fw# WITNESSE s ATIURNEY JOHN MIGNOLA, JR., OF ALAMEDA,CALIFORNIA VISE FOB. SNS.

Application filed October 27. 1533.

'[07:51 erft-jm it. may concern:

Specication of Letters Patent.

Patented Mar. 15, 1910.

Serial No. 524.955.

Be it known that l, Joux Miexom, Jr., l

a citizen of the Unied States, residing at l Alameda, m the county ofAlameda andg State of Californiafhave invented new and usefulImprovements in Vises for Saws, of g which the fellowing is aspeeitieation.

lhe olneet of the present invention isto provide an improved vise forholding saws. .ir as Prior rises used for this purpose, so

mj. knowledge extends. have heen defective 5,

in that they do not hold the saw with equal firmness and pressurethroughout its en-l tire length, rendering it ditlieult and lahorij eusto sharpen a saw held in such a vise.z

The present vise is so constructed as to avoid the, ahove defect. a.,

in the aeeonipanying drawing. Figure l is a plan view of the saw; Fig.'2 is a longitudinal section thereof in the open position; Fig. l is asimilar View in the elosedposition.

Referring to the drawing'. l yindicates the base ot the vise, which isformed with Screw holes Q for securing it to a work henelr or tahle.Said base is, at one end, greatly widened, as shown at Q 2, and tapersin thickness almost to a sharp edge. forming a stationary jaw,

ing upward from the base. said hase and extending forwardly saidstationary ja are two arms 3 between which is pivoted, as shown at 4, alever Rising from on tht`l front end of which formed a inovtoward saidstationary ]aw slop-1 ahle jaw G. said movahle jaw heine similar ingeneral forni to the stationa sloping downward trout said lever.

tween the comparatively thin and long lips i i little use. 1t i rarelythe ease that the saw is e? said stationary and n'iovahle jaws tht.l sawis clamped,

ln order to depress the lip ol the inovahlc statifniary gan', ther` ispivoted on the rear end of the jaw lever 5, as shown at S. a volte leverit. the central nzeniher l() of which forms :i linger piet:e..the sides:11 of which volte extend on opposite. i sides of the lever and areenlarged at the i ends to torni eeeentries or cams around the i(zonnet-tion S of the volte lever` with pivotal M'hen the yoke is movedfrom rearwardly Vthrough i of the movable jaw from that of thestutionaryY jaw when the volte is returned to its forward position,there is provided a coiled spring 13 around a rod 1i paring through therear end of the lever, 5, .id spring 13 hearing upon the top of thelever lv ani aware that there has; long been used a vise for 's similarto that ahove deserihed that in every respeet except l'or the additionofthe spring. and for the faut that. inftead of using :i yoke pivotallymuriel-ted at the rear ind of the lever. there is used tiiez'er-:it'h anoperating lever han ing a single. point ot eugagenaeut with the iuovahlejaw lever beneath the rear end of the latter. Although thi.` d viee hashelen ou the mariiet for many rs, l. have {onu-.l it, unless quite new,to be pruetieally .wrthless for the purpose desired. 'the reason isthat, with that consti-tation, it' there i` the slightest loowness ofthe herir-ing;` tor the pivet of the aimable -lav.' lever, then sinee,the 011erating,r .lever presses the rear end of the mov- :.i e jaw leverupward at. a in fle point only, and that snhftantiall't' on tl-e centrallongitudinal line of the latter le if, owing il) iltf.' lywtltt (il.lllt lr tlll! i'. tite 'Quint 0f contact or pressure i-v `lijg'htiy toom! side of :nid central line. whieh is vtry liable to happen owing tothe great distanee ot' ihis point front the hearings of said mvahle jawlever, then the pre-.suse lay the et ating lever, heilig at one. sideot' the ventral vertieal plane between the hearings of the nrn'zzlilejaw' lever. tends to tiit the sana' to one side, so that the pre--'n;e ieonsiderahly greater hetyzeen theY lips ot` the jaws a1 one end of thevise than at the other. In fart, after a f heldiirnily exeept at one endof the vise.

)ly pre-ent invention remedies this` defect h v providing,r that theupward pressure upon the relu' end of the movable jaw lever appliedequally at hoth sides of saiai latter lever. so that there can never heany tendeney whatever of said lever to twist, or to produce a greaterthe vise than at the other.

l claim z- 1. vi-e for saws eoniprising a base widened at the end toforni a stationary jaw, arms extending upwardly. and forwardly from saidhase.. a inorahl-l jaw, a lever therefor piroted liz-tween the forwardend of .said arias. and a volw-.shaped #um lever. the .sides of whichextend on opposite sides of the rear pressure at one end of armsextending upwardly and forwardly end of the jaw lever, and are pivoliedto Sad lever, Said sides belnfy formed with eaznshaped ends arranged tollear upon said base E to raise said ja v lever by the pivoted movel memof said yoke lever, substz.nLnll}- as described. l

2. A vise for saws comprising .a base widened a! the end to form astationary jaw,

from said base, a movable jaw, a lever therefor pvoed between theforward end of said ji, arms, and a yoke-shapedeam lever, the sides ofwhich extend on opposite sides of the rear i end of the jaw lever, andare pvoled to said jaw lever, said sides being formed with earn- .shapedends arranged o bear upon Saul base to rane. szud )aw lever by thepivotal movement of said `yoke lever, and a Spring for i normallydepressing the rear end ot Said )aw lever, substantially as desermed.

la testimony whereof I have hereunto .set

i m23' hand in the presence of two subscribing witnesses.

Jens MIGXQL, JR. llltnesses:

Fmxczs M. Ynienr, D. B. Rcsmlms.

